body {
  height: 100%;
  min-height: 100%;
  font: normal 16px sans-serif;
  line-height: 1.0;
  text-align: center;
  color: #000088;
  background: #ffffff;
}

.allcenter
{
  display: flex;
  justify-content: center;
  align-items: center;
  height: 600px;
}